A:How much is it?
B:How much are they?
如图,在△ABC中,∠C=90°,AB的垂直平分线MN分别交AC,AB于点D,E.若∠CBD:∠DBA=2:1,则∠A为( )
在罗斯福新政中,既直接提高就业率又为经济发展开拓空间的措施是( )